题目内容

肝脏是药物代谢的主要场所。（）

A. 对
B. 错

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药物代谢后，其药理活性均降低或失去活性。（）

A. 对
B. 错

The Yuan ___ established its capital in Dadu, now Beijing.

A.Dynasty
B.Age
C.Year
D.Majesty

___ is a system of timekeeping that defines the beginning and length and divisions of the year.

A.Time
B.Calendar
C.Agenda
D.Schedule

___ lines will never meet no matter howfar extended.

A.Cross
B.Alternate
C.Parallel
D.A web of